ASICS GEL-ZARACA Running Shoes Visible Rearfoot GEL - ASICS GEL is a silicone-based cushioning system designed to meet the needs of both professional and recreational athletes. Rearfoot GEL provides cushioning in all directions, absorbs impact forces and helps to stabilise the foot during heel contact.The GEL in the heel is left exposed in this case. Removeable Sockliner - A sockliner which can be removed to accommodate a medical orthotic. 3M reflectivity - Special reflective material which enhances visibility in poor light. AHAR - ASICS High Abrasion Resistance rubber is a tough compound used at the heavy contact areas of the outsole. It helps to reduce excessive wear and extend the life of the shoe. California Slip Lasting - This upper is stitched around the EVA board and directly attached to the midsole for better stability and ultimate comfort.